const multiplyNumeric = (obj) => {
  for(key in obj){
    type = typeof obj[key];
    if(type == "number"){
      obj[key] *= 2;
    }
  }
  return;
}

let menu = {
  width: 200,
  height: 300,
  title: "My menu"
};

console.log(menu);

multiplyNumeric(menu);

console.log(menu);
